Altus climate — normals and trends
Altus (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.4 °C and it receives 679 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (28.7 °C on average) and the coldest is January (3.3 °C). Rainfall peaks in May.
Altus averages 59 frost days, 109 hot days (≥ 30 °C) and 74 rainy days per year.
Altus has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 64 to 54 per year over the period.
The hottest day of the period reached 44.9 °C (on 19 July 2022) and the coldest -25.4 °C (on 4 January 1947).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
AltusOklahoma
- coords
- 34.64°, -99.33°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.4°C
Average daily high
22.7°C
Average daily low
10.8°C
Annual rainfall
679mm
Sunshine / day
10.0h
Mean relative humidity
60%
Average peak wind
23.6km/h
Seasonal range
25.4°C
Frost days (< 0 °C)
59 d/yr
Hot days (≥ 30 °C)
109 d/yr
Rainy days (≥ 1 mm)
74 d/yr
Annual snowfall
14.8 cm
Average feels-like high
21.0 °C
Average feels-like low
8.3 °C
Average peak gust
41.3 km/h
Tropical nights (≥ 20 °C)
90 d/yr
Solar radiation
18.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.32 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
44.9 °C
19 July 2022
Coldest day
-25.4 °C
4 January 1947
Wettest day
123 mm
20 October 1983
Windiest day
59.0 km/h
14 March 2025
Strongest gust
113.0 km/h
1 April 1983
Hottest feels-like
44.9 °C
13 July 2023
Coldest feels-like
-30.6 °C
4 January 1947
Snowiest day
17.9 cm
20 January 2007
Sunniest day
13.9 h
21 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 8.9 °C | -1.0 °C | 8 mm | -21 mm |
| Feb | 11.9 °C | -0.7 °C | 5 mm | -30 mm |
| Mar | 22.3 °C | +4.7 °C | 51 mm | -7 mm |
| Apr | 23.4 °C | +0.6 °C | 256 mm | +173 mm |
| May | 26.6 °C | -0.5 °C | 131 mm | +21 mm |
| Jun | 32.0 °C | 0.0 °C | 61 mm | -11 mm |
| Jul | 34.3 °C | -0.3 °C | 37 mm | -5 mm |
| Aug | 33.5 °C | -0.7 °C | 41 mm | -3 mm |
| Sep | 31.4 °C | +1.7 °C | 14 mm | -52 mm |
| Oct | 27.0 °C | +3.2 °C | 24 mm | -48 mm |
| Nov | 20.7 °C | +4.1 °C | 34 mm | -7 mm |
| Dec | 15.7 °C | +4.2 °C | 6 mm | -25 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Altus?
Altus has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.4 °C and it receives 679 mm of precipitation per year.
What is the hottest day ever recorded in Altus?
The hottest day measured in Altus between 1940 and 2025 was 19 July 2022, reaching 44.9 °C.
What is the coldest day in Altus?
The coldest day measured in Altus between 1940 and 2025 was 4 January 1947, at -25.4 °C.
Does it snow in Altus?
Yes. Altus gets on average 14.8 cm of snow per year and has around 59 frost days.
Has the climate of Altus warmed?
Yes: Altus warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Altus?
The wettest day measured in Altus between 1940 and 2025 was 20 October 1983, with 123 mm of rain in 24 hours.
What was the windiest day in Altus?
The windiest day measured in Altus between 1940 and 2025 was 14 March 2025, with winds reaching 59.0 km/h.
What is the warmest month in Altus?
The warmest month in Altus is July (28.7 °C on average); the coldest is January (3.3 °C).
How much does it rain in Altus?
Altus receives on average 679 mm of precipitation per year, spread over about 74 rainy days.
Is it sunny in Altus?
Altus gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
What is the biggest single-day snowfall in Altus?
The heaviest 24-hour snowfall measured in Altus between 1940 and 2025 was 20 January 2007, with 17.9 cm.
Are there tropical nights in Altus?
Yes: Altus has on average 90 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Altus?
In Altus, between 1940 and 2025, the highest apparent temperature reached 44.9 °C on 13 July 2023, and the lowest was -30.6 °C on 4 January 1947.
Compare Altus with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Altus